In 1986 at the age of 21, Yūta Mochizuki joined Japan Action Club, the organization responsible for training stunt actors appearing in Toei’s superhero television programs. In 1990, he began acting for television, eventually landing the role of J1, leader of the Neo Jetman team in the 15th Super Sentai installment, Chōjin Sentai JETMAN (1992). This eventually led to the starring role of Geki, leader of Dinosaur Sentai ZYURANGER (1992), the original Japanese TV series that would eventually begin the Power Rangers craze in North America and throughout the world.

In 1993, Mochizuki began appearing in the Sailor Moon musical as Tuxedo Mask and a number of other characters, as well as choreographing some of the action sequences. He was given the leading role of Koji Segawa, hero of the 1994 KAMEN RIDER J movie directed by Keita Amemiya, earning him the distinction of being the only actor to star as both a Super Sentai red hero and a Kamen Rider.

Mochizuki continued his career by branching out into voice-over work for TV anime series such as Toei’s Ojamajo Doremi (Magical Doremi) and Ashita no Nadja (Tomorrow’s Nadja) before retiring from the entertainment business in 2005.